Laura Boyce, who worked for the couple for seven months in 2007, claims Sheryl Lowe created an "extremely sexually offensive and hostile work environment ... behaving in a ... perverted, disgusting and crude manner."
Boyce also alleges that Sheryl used the "n" word in reference to Boyce's boyfriend, who was an NBA player.
Sheryl also allegedly "walked around naked, completely exposing herself" to Boyce, asked about her boyfriend's private parts and talked about Sheryl's sex life with Rob.
Boyce also claims wrongful termination against both Rob and Sheryl, in addition to unpaid wages and other labor code violations.
Larry Stein, the Lowes' attorney, said the lawsuit "seeks to drag (Lowe's) wife and children into the fray" with "false allegations." (Read the Lowes' full statement here.)
Boyce's lawyer, Gloria Allred would only say, "The lawsuit speaks for itself."
Lowe, 44, and his wife Sheryl, 46, preemptively filed lawsuits against Boyce and two other ex-employees on April 7. They claim they're the victims of an attempted $1.5 million extortion scheme, led by their former nanny, Jessica Gibson, 24.
A week later, Gibson filed a countersuit, alleging the actor repeatedly exposed himself and inappropriately touched her. Gibson worked for the couple off and on for seven years, having voluntarily quit twice, according to the Lowes.
Meanwhile, the third employee, Peter Clements, the Lowes' former private chef, has yet to file a legal response.
A deposition of the actor and his wife is set for May 19 and 20, respectively, in Santa Barbara, Calif., where they live.